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Flashcards in GI Imaging Deck (16)
0

What methods can be used to image the GI tract?

Plain X ray
Contrast studies
Ultrasound
Cross-sectional imaging
Angiography

1

What contrast studies can be used?

Barium swallow
Barium enema
Barium meal and follow through
Water-soluble contrast studies

2

What cross-sectional imaging can be done to view the GI tract?

Computed topography (CT)
Magnetic resonance imaging (MRI)

3

What X Rays can be done to view GI tract?

Abdominal (AXR)
Erect chest (CXR)

4

Does an MRI use radiation?

No

5

Does a CT scan use radiation?

Yes

6

Risks of CT scan?

Carcinogenesis
Genetic
Developmental risk to foetus

7

What are contrast studies used for?

To define hollow viscera

8

What is a barium enema?

Where the contrast is inserted rectally
Enables the colon to be visualised

9

What is ultrasound?

Use of sound waves to generate images
Frequency is 20KHz

10

Advantages of ultrasound?

Cheap compared to MRI/CT
Portable

11

Disadvantage of ultrasound?

Highly user dependent - may miss things

12

What can ultrasounds be used for?

See if there are gallstones
If common bile duct is dilated (indicates that there is an impacted gallstone in the duct)
View liver, portal vein, appendix

13

What is GI angiography and what is it useful for?

Visualising blood supply
Bleeding and ischaemia

14

How is GI angiography done?

Inject radio-opaque contrast agent intravenously
Use various modalities to capture images

15

Reasons for requesting a plain AXR?

Acute abdominal pain
Small/large novel obstruction
Acute exacerbation of IBD
Renal colic